Fuel/Water, Bearing/Rust

[David Lockhart]

Around Sep 02, I rebuilt one of my OS EFIs - new conrod, Shadel AAC piston/liner, and a stainless steel rear bearing w/ 2 rubber seals.  I use S&W fuel, 22% nitro, 17% synthetic, 2% castor and run dry at the end of every flying session and then "burn" some Amsoil MP through the engine (yes, the engine will run on the propellant in the Amsoil MP).  A fair bit of the Amsoil MP "oil" remains in the engine.

Approx 14 months and 700 flights later, the engine is running as strong as when it was rebuilt.  No bearing noise or roughness.  BTW - no brass fuel lines or clunk.

Dave Lockhart
DaveL322 at comcast.net
  ----- Original Message ----- 
  From: Bob Pastorello 
  To: discussion at nsrca.org 
  Sent: Saturday, December 06, 2003 11:17 AM
  Subject: Re: Fuel/Water, Bearing/Rust


  Good note, Ed!  And timely reminder about our old 2C .60 woes!  Man, my OS 61RF would go through the bearings like crazy!
      Maybe Dave L. will chime in about the double-seal bearings.  I'd bet just about anything that they're not "sealed", and that when removed, he's found plain ol' fuel oil leftovers coating 'em.  Maybe not.
      Dave ??  You home?

  Bob Pastorello, Oklahoma
  NSRCA 199, AMA 46373
  rcaerobob at cox.net
  www.rcaerobats.net

  Bob Pastorello, Oklahoma
  NSRCA 199, AMA 46373
  rcaerobob at cox.net
  www.rcaerobats.net


    ----- Original Message ----- 
    From: Ed Miller 
    To: discussion at nsrca.org 
    Sent: Saturday, December 06, 2003 10:12 AM
    Subject: Re: Fuel/Water, Bearing/Rust


    Think about this. Have you ever seen bearings rust in a tank with aluminum tubes and no clunk as in a Tetra bladder tank setup ?? I've seen it, Dave Funk's OS 140RX in his Hydeaway rusted the original bearing in very few flights. 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20031206/4db51978/attachment.html